"What are these?" Lyra asked in confusion. Even though she grew up in Mudstone and often strolled around the village, she had never witnessed such a terrifying sight.

"It’s magma but only Heaven knows what's inside," Adrian replied solemnly.

He was certain that both the cave and the magma pool were not naturally formed, but he did not know who built the tunnel and what was inside the pool.

"We've reached a dead end, so what do we do now?" Lyra asked.

Despite her curiosity, she was aware of